This monitor has clear video and sound. Supports 2.4GHz FHSS wireless transmission provides 100% digital privacy with delay-free video and audio playback. Screen Off, Audio On Mode Just short-press the power button, screen turns off whilst sound remains on. Battery consumption reduces by ~50%. It transforms the monitor into an audio-only monitor(power saving mode). Temperature Monitoring Alarm Remote in-room temperature display lets you know your baby is comfortable and safe. You can set the High/Low data, once temperature is out of range, it will alarm. Two-way Talk Sometimes all your baby needs is to hear the sound of your voice - comfort your infant with the 2-way talkback via the mic. Sound Activated LEDs A row of LEDs allows you to see the sound of your baby's voice alerting you if he/she is crying out when you have the volume turned down. It help poor hearing person on the parent unit. Invisible IR Night Vision Infrared LEDs automatically adjust to the level of light in the room and transmit a clear black and white image in low-light and darkened room conditions. Night Light Soft nightlight on the camera helps you find your way in the dark without waking up your baby. Digital Zoom Supports up to 4 total cameras to monitor multiple children or rooms with video and audio scan between rooms.2X digital zoom function for closer views on screen to see quality picture. MultifunctionLullaby Playing, Feeding Alarm,Low Battery and Out of Range Indicators, Manual pan/tilt/zoom, Adjustable Volume and Brightness Controls.Baby car mirror included Clear view make you peace of mind with your baby while driving. Glance at your baby without having to turn around. Safety devices for yourself to keep your eyes on the road.